JOSEPH IBN ḤASAN:

Arabic author of the fifteenth century or earlier. In 1467 he wrote "Muḥsin al-Adab," on culture, in fifty ḳaṣidahs. It was adapted from the "Sefer ha-Musar" of Isaac ibn Crispin, according to Steinschneider (Neubauer, "Cat. Bodl. Hebr. MSS." No. 1220, 4).